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1 <br /> 819 Strilcer Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> Analytical (916)921-0{916)921-01100 <br /> FAX 00 <br /> www sequoialabs com <br /> ' Geological Technics,Inc Project Cardoza 5412258 <br /> 1101 7th Street Project Number 662 2 Reported <br /> Modesto CA,95354 Project Manager Joseph Angulo 12/23/04 12 28 <br /> GasohnelBTEXIOxygenates by EPA method 8260B-Quality Control <br /> ' Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result limit units Level Result %REC Limits RPD Limit Notes <br /> ' - - ' <br /> Batch 4120262-EPA 5 [_0305 PIT] 1 EPA 82608 <br /> Blank(4120262-BLK1) Prared&Analyzed nalyzed 12/20/04 <br /> Ethanol ND 50 ug/l <br /> ' Tert-butyl alcohol ND 50 <br /> Methyl tert-butyl ether ND 050 <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tent-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> ' Benzene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> o11ne Range Organics(C4-Cl2) ND 50 " <br /> Surrogate 12-DCA d4 918 100 92 60-140 <br /> Surrogate Toluene-& 998 100 100 60-140 <br /> ' Surrogate 4-BFB 101 100 101 60-140 <br /> Blank(4120262-BLK2) Prepared 12/21/04 Analyzed 12/22/04 <br /> Ethanol ND 50 ug/l <br /> ' Tert-butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 050 <br /> D1-isopropyl ether ND 050 " <br /> I <br /> Ethyl tert-butyl ether ND 050 " <br /> t Tert-amyl methyl ether ND 050 " <br /> 1,2-Dlchloroed=e ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> ' Benzene ND 050 1, <br /> Ethylbenzene ND 050 <br /> Toluene ND 050 " <br /> ' Xylenes{total) ND 050 <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 12-DCA-d4 934 100 93 60-140 <br /> Surrogate Toluene-d8 966 100 97 60-140 <br /> ' Surrogate 4-BFB 102 100 102 60-146 j <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 10 of 13 <br />